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Finding the Fourth Proportional to 380,906.72, 525,646.08 and 211,137.28

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Solution

The fourth proportional to 380,906.72, 525,646.08 and 211,137.28 is: 291,366.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,906.72 : 525,646.08 = 211,137.28 : x
  2. Step 2: Convert to fraction form
    380,906.72/525,646.08 = 211,137.28/x
  3. Step 3: Cross multiply
    380,906.72x = 525,646.08 × 211,137.28
  4. Step 4: Simplify right side
    380,906.72x = 110,983,483,573.86
  5. Step 5: Solve for x
    x = 110,983,483,573.86/380,906.72
  6. Step 6: Final answer
    x = 291,366.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.